Newbie question, ref object

[JohnLuck]

I am trying to send headers using the asynchttpserver module, this is what the 
documentation gives me
    
    
        sendHeaders(req: Request; headers: HttpHeaders)
    
    
    Run

HttpHeaders documentation shows this: 
    
    
    HttpHeaders = ref object
      table*: TableRef[string, seq[string]]
    
    
    Run

I have now spent an hour trying everything I could think of, but I am sure it 
should be simple, so maybe someone here can help?